GFT808 Chipset (Gain Tech)S/W Control (Serial Communication)same as Rohm S/W76 ~ 98MHz (Japan)Full Channel BandChannel Step 100KHzLow CostFull StereoMono availableMute availableBuilt-in pilot tone systemDC 2.5V ~ 3.6VAudio input (20Hz~15KHz)13mm*14mm*1.65mm